Magnum primer pressure issues?

[mortman]

Hi,
Have some Federal small pistol magnum primers. Not sure what that means.

I am working up 9mm loads in the 1100-1200 fps. range. Am experimenting w. various powders: Clays, Titegroup, Bullseye.

My question is: am I risking a kaboom by using these primers? How much would the pressure increase? And, why exactly do magnum small pistol primers exist?

Any help appreciated.

M

[Sub95]

magnum primers are for slow burning powders, the slower powders takes a little more to get it to ignite and why you use magnum primers.

but you can use magnum primers with faster powders, but you need to start at minimum START loads and develop your loads in 2% increments and to watch pressure signs carefully.

[popeye4]

BTW, you should back off on any load and redevelop if you change primers. Magnums are hotter than standards within one manufacturer's line, but different manufacturers' products can produce different results. Winchester primers used to have a reputation for being hot, standards were equivalent to others magnums. Not sure if that's still true, but it illustrates the point.

[Fishslayer]

Just go buy a K of standard primers. The Great Primer Drought is over.

If the recipe doesn't call for magnum primers, I don't use magnum primers.

But if you must, follow the advice already given. Start low & work up. But we already do that anyway, right?